* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #1a1a2e;
    color: #eee;
    min-height: 100vh;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 20px;
}

header h1 {
    font-size: 2em;
    color: #e94560;
    margin-bottom: 5px;
}

.subtitle {
    color: #888;
    font-size: 0.9em;
}

.controls {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
    background: #16213e;
    padding: 15px;
    border-radius: 10px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.control-group label {
    font-size: 0.8em;
    color: #aaa;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.control-group select {
    background: #0f3460;
    color: #eee;
    border: 1px solid #333;
    padding: 8px 12px;
    border-radius: 5px;
    font-size: 1em;
    cursor: pointer;
}

.control-group select:hover {
    border-color: #e94560;
}

.chart-container {
    background: #16213e;
    border-radius: 10px;
    padding: 20px;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.chart-header h2 {
    font-size: 1.3em;
    color: #e94560;
}

.legend {
    display: flex;
    gap: 15px;
    font-size: 0.85em;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 5px;
}

.legend-color {
    width: 14px;
    height: 14px;
    border-radius: 3px;
    display: inline-block;
}

.legend-color.raise { background: #4caf50; }
.legend-color.call { background: #2196f3; }
.legend-color.fold { background: #f44336; }

.chart {
    display: grid;
    /* 1 row/column label cell + 13 rank columns = 14 total columns */
    grid-template-columns: repeat(14, 1fr);
    gap: 2px;
    width: 100%;
    max-width: 750px;
    margin: 0 auto;
}

.cell {
    aspect-ratio: 1;
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7em;
    font-weight: bold;
    cursor: pointer;
    position: relative;
    transition: transform 0.1s;
    color: #fff;
    text-shadow: 0 1px 2px rgba(0,0,0,0.5);
}

.cell:hover {
    transform: scale(1.15);
    z-index: 10;
    box-shadow: 0 0 10px rgba(255,255,255,0.3);
}

.cell.empty {
    background: transparent;
    cursor: default;
}

.cell.empty:hover {
    transform: none;
    box-shadow: none;
}

.cell-label {
    background: #0f3460;
    color: #aaa;
    font-size: 0.6em;
    cursor: default;
}

.cell-label:hover {
    transform: none;
    box-shadow: none;
}

.tooltip {
    position: fixed;
    background: #0f3460;
    border: 1px solid #e94560;
    border-radius: 8px;
    padding: 10px 14px;
    font-size: 0.85em;
    pointer-events: none;
    display: none;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0,0,0,0.4);
    max-width: 250px;
}

.tooltip .hand-name {
    font-size: 1.2em;
    font-weight: bold;
    color: #e94560;
    margin-bottom: 5px;
}

.tooltip .action-row {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    margin: 2px 0;
}

.tooltip .action-name {
    color: #aaa;
}

.tooltip .action-pct {
    font-weight: bold;
}

.tooltip .action-pct.raise { color: #4caf50; }
.tooltip .action-pct.call { color: #2196f3; }
.tooltip .action-pct.fold { color: #f44336; }

.chart-message {
    grid-column: 1 / -1;
    text-align: center;
    color: #aaa;
    padding: 60px 20px;
    font-size: 1em;
    line-height: 1.5;
}

@media (max-width: 600px) {
    .cell {
        font-size: 0.5em;
    }
    .controls {
        flex-direction: column;
        align-items: center;
    }
}